266868780 has 48 divisors (see below), whose sum is σ = 761340384. Its totient is φ = 69821440.

The previous prime is 266868779. The next prime is 266868787. The reversal of 266868780 is 87868662.

It is not an unprimeable number, because it can be changed into a prime (266868787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38781 + ... + 45140.

It is an arithmetic number, because the mean of its divisors is an integer number (15861258).

Almost surely, 2^266868780 is an apocalyptic number.

266868780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266868780 is an abundant number, since it is smaller than the sum of its proper divisors (494471604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266868780 is a wasteful number, since it uses less digits than its factorization.

266868780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83986 (or 83984 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The square root of 266868780 is about 16336.1188781179. The cubic root of 266868780 is about 643.8221639025.

The spelling of 266868780 in words is "two hundred sixty-six million, eight hundred sixty-eight thousand, seven hundred eighty".